My suggestion would be to also have hubby do all the training, and all the affections. If Brutus needs to potty, have hubby take him out.. and use LOTS of YUMMY Food. You will have to try to step back, don't show any affections to him, don't feed him.. Let hubby be "Main" Caretaker I guess.. And then Brutus may get the idea, that this man isn't bad, but is how he gets his tummy full, and gets his affections. Maybe put the leash on him *till brutus gets better* But let hubby walk him alone. Find something Brutus is SOOOOO Excited to eat. Hot dogs, Cheese, W/e... and make in small peices, and have him use that.

Good luck! And it will take time!